期刊
MATERIALS HORIZONS
卷 9, 期 11, 页码 2881-2892出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2mh00880g
关键词
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资金
- National Natural Science Foundation of China [21835005]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX22_3202]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions
In this study, physically crosslinked ionogels based on metal-organic frameworks were developed. These ionogels exhibit high stretchability and toughness, and both the mechanical and electrical properties can be restored. The results have important implications for the development of future green sensors.
Ionogel-based flexible sensors are widely applied in wearable biomedical devices and soft robots. However, the abandoned ionic sensors are rapidly turning into e-waste. Here, we harness the porosity and the coordination of metal sites of metal-organic frameworks (MOFs) to develop physically crosslinked ionogels, which are composed of polymer chains that coordinate with the MOF metal sites. The covalent crosslinking of the host material transformed into reversible bond interactions that significantly enhance the mechanical properties of the MOF-ionogels. The obtained ionogels can endure an 11 000% stretch and exhibit Young's modulus and toughness of 58 MPa and 25 MJ m(-3), respectively. In addition, the fracture energy is as high as 125 kJ m(-2), outperforming most reported ionogels. Furthermore, the UiO-66-ionogels are fully recyclable and both the mechanical and electrical properties can be restored. The results of this work provide a new vision for the development of future green sensors.
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